removed intent_ref from frontend

frontend/pshared/lib/service/payment/multiple.dart

@@ -37,8 +37,6 @@ class MultiplePaymentsService {
     String quoteRef, {
     String? idempotencyKey,
     Map<String, String>? metadata,
-    String? intentRef,
-    List<String>? intentRefs,
   }) async {
     _logger.fine(
       'Executing multiple payments for quote $quoteRef in $organizationRef',
@@ -47,8 +45,6 @@ class MultiplePaymentsService {
       idempotencyKey: idempotencyKey ?? const Uuid().v4(),
       quoteRef: quoteRef,
       metadata: metadata,
-      intentRef: intentRef,
-      intentRefs: intentRefs,
     );
 
     final response = await AuthorizationService.getPOSTResponse(